A researcher performed a study to determine whether political party affiliations are different for different income brackets.She obtained the following sample data.

A)Goodness-of-fit
B)Independence
C)Homogeneity

Question

A researcher performed a study to determine whether political party affiliations are different for different income brackets.She obtained the following sample data.

A)Goodness-of-fit 
B)Independence 
C)Homogeneity

Quizplus · Accepted Answer

The sample data can be analyzed using the test for homogeneity, which determines whether the proportions of categorical variables are the same between two or more groups. In this case, the groups are defined by income brackets, and the categorical variable is political party affiliation. The test for homogeneity is appropriate when the same variable is measured on two or more independent samples, and the goal is to determine whether the proportions of categories are the same across samples. The other two tests, goodness-of-fit and independence, are appropriate for different types of research questions, and are not applicable in this case.

A Researcher Performed a Study to Determine Whether Political Party